Just to be direct, what does this poison type do. Its effect is "concentrated", whatever that means. All i know is that it deals less damage.

Any insite please?

I'm curious about this myself.

I've looked everywhere, but still cant find any info on what the difference actually is.

It probably reduces max health/stamina/magicka.

I'm surprised Bethesda hasn't documented stuff like this. It's amateurish, really.